Lead-free glass composition having properties similar to lead crystal
glass
    1.
    发明授权
    Lead-free glass composition having properties similar to lead crystal glass 失效
    无铅玻璃组合物,具有与铅晶玻璃相似的特性

    公开(公告)号:US5376597A

    公开(公告)日:1994-12-27

    申请号:US138062

    申请日:1993-10-20

    CPC classification number: C03C4/0028 C03C3/078 Y10S501/903

    Abstract: A glass composition is disclosed wherein the density and the refraction index and the dispersion value of light are equal to or higher than those of conventional lead-containing crystal glass while no lead is contained therein at all. The glass composition comprises 50 to 60% by weight of SiO.sub.2, 5 to 13% by weight of K.sub.2 O, 5 to 8% by weight of TiO.sub.2, 10 to 15% by weight of BaO, 5 to 10% by weight of ZnO, 3 to 10% by weight of Na.sub.2 O, 1 to 5% by weight of CaO, and 0.3 to 0.8% by weight of Sb.sub.2 O.sub.3.

    Abstract translation: 公开了一种玻璃组合物,其中光的密度,折射率和色散值等于或高于常规含铅晶体玻璃,其中根本不含铅。 玻璃组合物包含50至60重量%的SiO 2,5至13重量%的K 2 O,5至8重量%的TiO 2,10至15重量%的BaO,5至10重量%的ZnO,3 至10重量%的Na 2 O,1至5重量%的CaO和0.3至0.8重量%的Sb 2 O 3。

    Production method for lead-free crystal glass composition
    2.
    发明授权
    Production method for lead-free crystal glass composition 失效
    无铅水晶玻璃组合物的生产方法

    公开(公告)号:US5897678A

    公开(公告)日:1999-04-27

    申请号:US899154

    申请日:1997-07-23

    CPC classification number: C03C3/078 C03C4/0028 Y10S501/903

    Abstract: The invention provides a method by which a crystal glass composition which employs TiO.sub.2 as a raw material substituted for PbO can be produced while effectively preventing development of a yellowish color of the glass composition which is caused by TiO.sub.2. In the production method, to a batch composition which is composed of 50 to 60 percent by weight of SiO.sub.2, 4 to 14 percent by weight of K.sub.2 O, 10 to 20 percent by weight of BaO and 3 to 10 percent by weight of TiO.sub.2, NaNO.sub.3 (sodium nitrate) is added by 1.0 to 5.0 percent by weight or BaO.sub.2 (barium peroxide) is added by 0.3 to 2.0 percent by weight for elimination of development of a color which arises from the 3 to 10 percent by weight of TiO.sub.2, and also one of Sb.sub.2 O.sub.3 (antimony oxide) and As.sub.2 O.sub.3 (arsenious acid) is added by 0.2 to 1.0 percent by weight for defoaming. Instead, NaSb(OH).sub.6 (sodium antimonate) having color development elimination and defoaming actions may be added by 0.5 to 2.0 percent by weight.

    Abstract translation: 本发明提供一种可以制造以TiO 2为原料代替PbO的水晶玻璃组合物,同时有效地防止由TiO 2引起的玻璃组合物的淡黄色。 在制造方法中,对于由50〜60重量%的SiO 2,4〜14重量%的K 2 O,10〜20重量%的BaO和3〜10重量%的TiO 2组成的间歇组合物,NaNO 3 (硝酸钠)添加1.0〜5.0重量%,或添加0.3重量%至2.0重量%的BaO 2(过氧化钡),以消除由3至10重量%的TiO 2引起的颜色的显影,并且还 Sb2O3(氧化锑)和As2O3(砷酸)中的一种相对于消泡而添加0.2〜1.0重量%。 相反,具有显色消除和消泡作用的NaSb(OH)6(锑酸钠)可以加入0.5-2.0重量%。

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